Finding the Third Proportional to 20,576 and 42,608

Step by Step Solution

1. Step 1: Write the proportion equation
   20,576 : 42,608 = 42,608 : x
2. Step 2: Convert to fraction form
   20,576/42,608 = 42,608/x
3. Step 3: Cross multiply
   20,576x = 42,608 × 42,608
4. Step 4: Simplify right side
   20,576x = 1,815,441,664
5. Step 5: Solve for x
   x = 1,815,441,664/20,576
6. Step 6: Final answer
   x = 88,231.03